The Green Glass Sea is a children's historical fiction novel by Ellen Klages, set in Los Alamos, New Mexico, during World War II. It follows 11-year-old Dewey Kerrigan, a mechanical whiz and outcast, who moves to the secretive town to live with her father, a scientist working on a classified project known as the "gadget." As Dewey navigates her new life, she befriends another outsider, Susan "Suze" Gordon, and together they forge a deep bond amidst the pressures of their environment. The story explores themes of friendship, identity, and the moral implications of scientific discovery, culminating in the test of the atomic bomb and its devastating aftermath. The novel won several awards, including the Scott O’Dell Award for Historical Fiction.